Unidentified Submerged Objects. Sonic anomalies. Deadly encounters beneath Lake Baikal. In this episode of Hangar 51 Files, we delve into one of the Cold War’s most bizarre and least known fronts: the Soviet Union’s underwater encounters with the unexplained. Known as the “Quackers,” these mysterious sonar signatures were fast, erratic, and, according to Soviet records, nothing like any known submarine or marine creature.

From declassified KGB reports to naval divers who claim to have witnessed humanoid “swimmers” in Baikal’s depths, we explore the evidence of a hidden naval mystery. Were these sightings secret NATO prototypes, naturally occurring but misunderstood phenomena—or were the Soviets confronting something far stranger?

Join us for a deep-dive into Cold War paranoia, underwater anomalies, and the murky line between science, secrecy, and the supernatural.

This is a public episode. If you'd like to discuss this with other subscribers or get access to bonus episodes, visit hangar51files.substack.com/subscribe